Lay-driving mechanism for vertical looms



(No Model.) 2 Sheets-Sheet 1.

- A. D. EMERY.

LAY DRIVING MECHANISM FOR VERTICAL LOOMS. No. 503,457. Patented Aug. 15,1893.

Fig.3

LiJHHEEEEE I may "fjw 9 vfi 'u I 2 Sheets-Sheet 2. A. D. EMERY. I LAYDRIVING MECHANISM FOR VERTICAL LUOMS- N0. 503,457;

(No Model.

Patented Aug. 15, 1893.

a l rwggmr i Fl t'g- LUH EEEEE Umrrnn STATES PATENT @rrrcn.

ABRAM D. EMERY, OF TAUNTON, MASSACHUSETTS.

LAY-DRIVING MECHANISM FOR VERTICAL LOOMS.

SPECIFICATION forming part of Letters Patent No. 503,457, dated August15, 1893.

Application filed October 6,1890. Renewed December 1, 1892. Serial No.453,684. (No model.)

T0 at whom it may concern.-

Be it known that I, ABRAM D. EMERY, of Taunton, Massachusetts, haveinvented certain Improvements in Lay-Driving Mechanism for VerticalLooms, of which the following is a specification.

The objects of this improvement are to increase the compactness oforganization of vertical looms, to present the lay-driving shaft inconvenient position for manual operation when the necessity for suchoperation arises and to diminish to some extent the vibration to whichvertical looms are ordinarily subject when in operation.

The invention consists in mounting upon the rear side of the frame ofthe loom the double crank shaft from which motion is derived to operatethe vertically reciprocating lay; and in transmitting motion from thecrank shaft to the lay by trains of devices each of which includes abell-crank lever pivoted to the frame and having one of its ends linkedto one of the cranks and its opposite end linked to the lay whereby theweight of the lay is carried upon the bell-crank levers. By this mode oforganization, the principal portions of the trains of devices whichtransmit from the crank shaft the power to reciprocate the lay move inpaths which are inclined from the path of movement of the lay, so thatso much of the strain due to the moving of the lay as is transmitted tothe bearings of the crank shaft is so transmitted in a directionsubstantially at an angle of forty-five degrees from the perpendicular,and a portion of the strain due to the moving of the lay is taken by thepivots which connect the bell crank levers to the frame. The crank shaftand the parts immediately connected with it are presented in positionsin which they are easy of access and in which they are out of the way ofthe other moving parts of the loom structure.

The accompanying drawings exhibit so much of the loom structure as isrequired to show the construction and mode of operation of theimprovement and are as follows, viz:

Figure l is a side elevation of a portion of the loom aifording an endview of the lay and a view, partly in dotted lines, of one of the trainsof mechanism for transmitting motion from the crank shaft to the lay.Fig. 2 is a rear elevation of the parts of the loom shown in Fig. 1, thecentral portion of the lay and the crank shaft being represented asbroken away. Figs. 3, 4 and 5 are diagrams illustrating variouspositions assumed by the lay driving mechanism during a completerevolution of the crank shaft, or in other words, during a single beatof the lay.

The drawings represent the upper portions or a of the side frames of theloom on the rear of which the boxes at a afford the bearings for theopposite ends of the crank shaft b. The crank shaft 12 is providedbetween the bearings with two cranks b b. One of the overhanging ends ofthe crank shaft has affixed to it the brake-wheel b the tight pulley bthe loose pulley b and the hand wheel b the latter being loaded upon oneside by having affixed to it the weights Z) and b the purpose of whichis to counterbalance the weight of the lay cduring its movement. The layis guided in its reciprocating movement in a vertical path by means ofthe vertical guide rods, cl d, which extend through the tubularbearingsv c c afiixed to the lay, and have their opposite ends securedrespectively in the brackets 61' d, which are appropriately fastened tothe side frames of the 100111. Two similar trains of mechanism transmitmotion from the crank shaft to the lay. Each of these trains ofmechanism consists of a bell crank lever 6 having its axis ofoscillation upon the pivot e projecting horizontally inward from thebracket 6 bolted to the side frame of the loom. One of the free ends ofthe bell crank lever is connected by the link 6 with the crank b, andthe other free end of the bell crank lever is connected by the link 6with the pivot e inserted through the downwardly depending ears of thebracket e aftixed to the under side of the 1in Fig. l the lay isrepresented as having completed one half of its downward stroke. Thecrank shaft is rotated in the direction indicated by the arrow f, onFig. 1, and it will be seen that during the descending motion of thelay, the weights are making their upward movement. Thus the weight ofthe lay in descending is utilized to assist in elevating the weightedside of the hand wheel and similarly the weighted side of the hand wheelin descending assists in elevating the It will of course be understoodthat if found desirable in practice two side weighted wheels like thewheel 12 may be employed, in which case such additional wheel may beconveniently affixed to the end b of the crank shaft.

It is not intended that thelay shall be fully counterbalanced, but onthe contrary, that it shall be of such superior gravity that it willfall byits own weightwhen theloom is stopped, the side load being merelyheavy enough to serve as what is known as a running counterbalance.

In ordinary looms, in which the crank shaft is immediately beneath thelay, the counterbalancing weights are placed upon the counterbalancewheel in positions radially opposite the crank. In the present case, itwill be seen that the counter-balancing weights are not radiallyopposite the crank, but are so placed with relation to the devices fortransmitting motion from the crank shaft to the lay that the center ofgravity of the weights is in its highest position when the lay is in itslowest position, and vice versa, as is diagrammatically illustrated inFigs. 3, 4 and 5. As Will be seen on reference to these diagrams, thecenter of gravity of the side weights is on a radius within aboutsixty-four degrees of the radius of the crank, the radial position ofthe I weights, relatively to the crank, being deter- I mined by theheight of the crank shaft rela tively to the medium position of the lay.Thus,

if thecrank shaft should be mounted in a lower position upon the frame,the distance of the weights from the crank would require to beincreased; and, vice versa, if the crank shaft should be mounted ina'higher position'o'n the frame, the distance of the weights from thecrank shaft would require to be diminished, in order that in either casethe weights would be made to occupy their highest positions when the layis in its lowest position, and vice versa. By this organization theweight of the lay is carried upon the bell-crank levers, a portion ofthe strain and jarring effect resulting from the vertical reciprocatingmovements of the lay is delivered in an inclined backward direction,partly to the pivotal connection of the bell crank lever with the frameand partly to the crank sh aft; and hence it results that there is lessvibration of the loom structure than there would be if the crank shaftwere situ' ated immediately beneath the lay. In the latter case, all thevibratory movements imparted to the loom structure would be in avertical direction, while by the present invention only a portion ofthose movements are in a vertical direction, the remaining portion beingin a direction more or less inclined from the perpendicular.

What is claimed as the invention is 1. The combination as herein setforth of a vertically reciprocating layupon the front side of an uprightloom, with a crank shaft in the rear thereof and below the level of thelay and two trains of mechanism for carrying the weight of said lay andfor transmitting from said crank shaft motion to drive said lay, each ofwhich trains of mechanism embraces essentiallyabellcrankleverpivote'd totheframe of the loom between the crank shaft and lay and linksconnecting the lay and one of the cranks on said crank shaft with thefree extremities respectively of said bell crank lever.

2. The combination, as herein setforth, of a vertically reciprocatinglay upon the front side of an upright loom, a crank shaft in the rearthereof and below the level of said lay, trains of mechanism forcarrying the weight of said lay and for transmitting from said crankshaft motion to drive said lay, each of whichsaid trains of mechanismembraces essentially a bell-crank lever pivoted to the frameof the loombetween the crank shaft and lay, and

links connecting the lay and one of the cranks on said crank shaft withthe free extremities, v

respectively, of said bell-crank lever; and means for counterbalancingsaid lay.

ABRAM D. EMERY. Witnesses:

EDGAR L. CROSSMAN, GEORGE L. WHITE.

